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Diffstat (limited to 'src/mem/ruby/network/orion/Buffer/SRAM.cc')
-rw-r--r-- | src/mem/ruby/network/orion/Buffer/SRAM.cc | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/src/mem/ruby/network/orion/Buffer/SRAM.cc b/src/mem/ruby/network/orion/Buffer/SRAM.cc new file mode 100644 index 000000000..d8f500de5 --- /dev/null +++ b/src/mem/ruby/network/orion/Buffer/SRAM.cc @@ -0,0 +1,271 @@ +/* + * Copyright (c) 2009 Princeton University, and + * Regents of the University of California + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Hangsheng Wang (Orion 1.0, Princeton) + * Xinping Zhu (Orion 1.0, Princeton) + * Xuning Chen (Orion 1.0, Princeton) + * Bin Li (Orion 2.0, Princeton) + * Kambiz Samadi (Orion 2.0, UC San Diego) + */ + +#include <iostream> +#include <cmath> +#include <cassert> + +#include "mem/ruby/network/orion/Buffer/SRAM.hh" +#include "mem/ruby/network/orion/Buffer/OutdrvUnit.hh" +#include "mem/ruby/network/orion/Buffer/AmpUnit.hh" +#include "mem/ruby/network/orion/Buffer/BitlineUnit.hh" +#include "mem/ruby/network/orion/Buffer/MemUnit.hh" +#include "mem/ruby/network/orion/Buffer/PrechargeUnit.hh" +#include "mem/ruby/network/orion/Buffer/WordlineUnit.hh" +#include "mem/ruby/network/orion/Buffer/DecoderUnit.hh" + +using namespace std; + +SRAM::SRAM( + uint32_t num_entry_, + uint32_t line_width_, + bool is_fifo_, + bool is_outdrv_, + uint32_t num_read_port_, + uint32_t num_write_port_, + uint32_t num_data_end_, + const string& rowdec_model_str_, + const string& wl_model_str_, + const string& bl_pre_model_str_, + const string& mem_model_str_, + const string& bl_model_str_, + const string& amp_model_str_, + const string& outdrv_model_str_, + const TechParameter* tech_param_ptr_ + ) +{ + assert(num_entry_ == num_entry_); + assert(line_width_ == line_width_); + assert(num_read_port_ == num_read_port_); + assert(num_write_port_ == num_write_port_); + assert(num_data_end_ == num_data_end_); + + m_num_entry = num_entry_; + m_line_width = line_width_; + m_is_fifo = is_fifo_; + m_is_outdrv = is_outdrv_; + + m_num_read_port = num_read_port_; + m_num_write_port = num_write_port_; + m_num_data_end = num_data_end_; + + m_rowdec_model_str = rowdec_model_str_; + m_wl_model_str = wl_model_str_; + m_bl_pre_model_str = bl_pre_model_str_; + m_mem_model_str = mem_model_str_; + m_bl_model_str = bl_model_str_; + m_amp_model_str = amp_model_str_; + m_outdrv_model_str = outdrv_model_str_; + m_tech_param_ptr = tech_param_ptr_; + + init(); +} + +SRAM::~SRAM() +{ + delete m_outdrv_unit_ptr; + delete m_amp_unit_ptr; + delete m_bl_unit_ptr; + delete m_mem_unit_ptr; + delete m_bl_pre_unit_ptr; + delete m_wl_unit_ptr; + delete m_rowdec_unit_ptr; +} + +double SRAM::calc_e_read( + bool is_max_ + ) const +{ + double e_atomic; + double e_read = 0; + + // decoder + if (m_rowdec_unit_ptr != NULL) + { + e_atomic = m_rowdec_unit_ptr->get_e_chg_addr()*m_rowdec_unit_ptr->get_dec_width()*(is_max_? 1:0.5); + e_atomic += m_rowdec_unit_ptr->get_e_chg_output(); + // assume all 1st-level decoders change output + e_atomic += m_rowdec_unit_ptr->get_e_chg_l1()*m_rowdec_unit_ptr->get_num_in_2nd(); + e_read += e_atomic; + } + + //wordline + e_atomic = m_wl_unit_ptr->get_e_read(); + e_read += e_atomic; + + //bitline pre + e_atomic = m_bl_pre_unit_ptr->get_e_charge_gate()*m_line_width; + if (m_num_data_end == 2) + { + e_atomic += m_bl_pre_unit_ptr->get_e_charge_drain()*m_line_width; + } + else + { + e_atomic += m_bl_pre_unit_ptr->get_e_charge_drain()*m_line_width*(is_max_? 1:0.5); + } + e_read += e_atomic; + + //bitline + if (m_num_data_end == 2) + { + e_atomic = m_bl_unit_ptr->get_e_col_read()*m_line_width; + } + else + { + e_atomic = m_bl_unit_ptr->get_e_col_read()*m_line_width*(is_max_? 1:0.5); + } + e_read += e_atomic; + + if (m_num_data_end == 2) + { + e_atomic = m_amp_unit_ptr->get_e_access()*m_line_width; + e_read += e_atomic; + } + + if (m_outdrv_unit_ptr != NULL) + { + e_atomic = m_outdrv_unit_ptr->get_e_select(); + + e_atomic += m_outdrv_unit_ptr->get_e_chg_data()*m_line_width*(is_max_? 1:0.5); + + //assume 1 and 0 are uniformly distributed + if ((m_outdrv_unit_ptr->get_e_out_1() >= m_outdrv_unit_ptr->get_e_out_0()) || (!is_max_)) + { + e_atomic += m_outdrv_unit_ptr->get_e_out_1()*m_line_width*(is_max_? 1:0.5); + } + if ((m_outdrv_unit_ptr->get_e_out_1() < m_outdrv_unit_ptr->get_e_out_0()) || (!is_max_)) + { + e_atomic += m_outdrv_unit_ptr->get_e_out_0()*m_line_width*(is_max_? 1:0.5); + } + + e_read += e_atomic; + } + + return e_read; +} + +double SRAM::calc_e_write( + bool is_max_ + ) const +{ + double e_atomic; + double e_write = 0; + + // decoder + if (m_rowdec_unit_ptr != NULL) + { + e_atomic = m_rowdec_unit_ptr->get_e_chg_addr()*m_rowdec_unit_ptr->get_dec_width()*(is_max_? 1:0.5); + e_atomic += m_rowdec_unit_ptr->get_e_chg_output(); + // assume all 1st-level decoders change output + e_atomic += m_rowdec_unit_ptr->get_e_chg_l1()*m_rowdec_unit_ptr->get_num_in_2nd(); + e_write += e_atomic; + } + + //wordline + e_atomic = m_wl_unit_ptr->get_e_write(); + e_write += e_atomic; + + //bitline + e_atomic = m_bl_unit_ptr->get_e_col_wrtie()*m_line_width*(is_max_? 1:0.5); + e_write += e_atomic; + + //mem cell + e_atomic = m_mem_unit_ptr->get_e_switch()*m_line_width*(is_max_? 1:0.5); + e_write += e_atomic; + + return e_write; +} + +double SRAM::calc_i_static() const +{ + double i_static = 0; + + i_static += m_bl_unit_ptr->get_i_static()*m_line_width*m_num_write_port; + i_static += m_mem_unit_ptr->get_i_static()*m_num_entry*m_line_width; + i_static += m_bl_pre_unit_ptr->get_i_static()*m_line_width*m_num_read_port; + i_static += m_wl_unit_ptr->get_i_static()*m_num_entry*(m_num_read_port+m_num_write_port); + + return i_static; +} + +void SRAM::init() +{ + // output driver unit + if (m_is_outdrv) + { + m_outdrv_unit_ptr = new OutdrvUnit(m_outdrv_model_str, this, m_tech_param_ptr); + } + else + { + m_outdrv_unit_ptr = NULL; + } + + // sense amplifier unit + if (m_num_data_end == 2) + { + m_amp_unit_ptr = new AmpUnit(m_amp_model_str, m_tech_param_ptr); + } + else + { + m_amp_unit_ptr = NULL; + } + + // bitline unit + m_bl_unit_ptr = new BitlineUnit(m_bl_model_str, this, m_tech_param_ptr); + + // mem unit + m_mem_unit_ptr = new MemUnit(m_mem_model_str, this, m_tech_param_ptr); + + // precharge unit + double bl_pre_unit_load = m_bl_unit_ptr->get_pre_unit_load(); + m_bl_pre_unit_ptr = new PrechargeUnit(m_bl_pre_model_str, bl_pre_unit_load, this, m_tech_param_ptr); + + // wordline unit + m_wl_unit_ptr = new WordlineUnit(m_wl_model_str, this, m_tech_param_ptr); + + // decode unit + if (!m_is_fifo) + { + m_rowdec_width = (uint32_t)log2((double)m_num_entry); + m_rowdec_unit_ptr = new DecoderUnit(m_rowdec_model_str, m_rowdec_width, m_tech_param_ptr); + } + else + { + m_rowdec_unit_ptr = NULL; + } + return; +} + + |